package com.xja.shoppingmall.advice;

import com.xja.shoppingmall.annotation.IgnoreResponseAdvice;
import com.xja.shoppingmall.vo.CommonResponseVO;
import org.springframework.core.MethodParameter;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;

/**
 * @author CHENCHEN
 * @title  统一相应
 * @createTime 2021-12-1021:34
 */
@RestControllerAdvice(value="com.xja.shoppingmall")
public class CommonResponseVODataAdvice implements ResponseBodyAdvice<Object> {

    @Override
    public boolean supports(MethodParameter methodParameter, Class<? extends HttpMessageConverter<?>> aClass) {
        if (methodParameter.getDeclaringClass()
                .isAnnotationPresent(IgnoreResponseAdvice.class)) {
            return false;
        }

        if (methodParameter.getMethod().isAnnotationPresent(IgnoreResponseAdvice.class)) {
            return false;
        }

        return true;
    }

    @Override
    public Object beforeBodyWrite(Object o, MethodParameter methodParameter, MediaType mediaType, Class<? extends HttpMessageConverter<?>> aClass, ServerHttpRequest serverHttpRequest, ServerHttpResponse serverHttpResponse) {
        // 定义最终的返回对象
        CommonResponseVO response = new CommonResponseVO(0, "");

        if (null == o) {
            return response;
        } else if (o instanceof CommonResponseVO) {
            response = (CommonResponseVO) o;
        } else {
            response.setData(o);
        }

        return response;
    }
}
